0.857
IF5
0.900
IF
Q3
JCR
0.92
CiteScore
0.405
SJR
Q2
SJR
20
MNiSW
165.24
ICV
SHORT COMMUNICATION
 
CC-BY 4.0
 
 

Effect of copper and zinc on blood and milk parameters and performance of dairy cows

Z.-B. Yang 1  ,  
W.-R. Yang 1,  
S.-Z. Jiang 1,  
G. G. Zhang 1,  
Z. Y. Li 1,  
 
1
Department of Animal Nutrition, Shandong Agricultural University, Daizong Road No.61,Taian, 271018 Shandong, P.R. China
J. Anim. Feed Sci. 2007;16(Suppl. 2):571–575
Publish date: 2007-09-17
KEYWORDS:
ABSTRACT:
Thirty fives Holstein cows were chosen to study the blood biochemical indicators with a single-factor test design in three copper levels (21.5, 31.5 and 41.5 mg/kg) and three zinc levels (50.15, 90.15 and 130.15 mg/kg). The results showed that the supplement of 20 mg of Cu/kg DM and above 40 mg of Cu/kg DM may increase Cu-Zn-superoxide dismutase (Cu-Zn-SOD) in milk (P<0.05), but did not increase milk yield and improve chemical composition (P>0.05). Zinc concentration in milk could be higher as supplemented 80 mg of Zn/kg DM (P<0.05). The concentration of copper, serum ceruloplasmin, haemoglobin and the activity of Cu-Zn-SOD in blood may be increased (P<0.01) by 37, 60, 5.1 and 5.9%, respectively, as the supplement of dietary copper was above 31.5 mg/kg.
CORRESPONDING AUTHOR:
Z.-B. Yang   
Department of Animal Nutrition, Shandong Agricultural University, Daizong Road No.61,Taian, 271018 Shandong, P.R. China
ISSN:1230-1388